#first trip
$self->session_config(
    DEFAULT_EXPIRY      => '+8h',
    COOKIE_PARAMS       => { -name => 'SESSION_ID1',
                             -expires => '+8h',
                             -path    => '/',
                           },
    SEND_COOKIE         => 1,
 );
 
 $self->session->param('user' => 'Fred');

#later trip
$self->session_config(
    DEFAULT_EXPIRY      => '+8h',
    COOKIE_PARAMS       => { -name => 'SESSION_ID2',
                             -expires => '+8h',
                             -path    => '/',
                           },
    SEND_COOKIE         => 1,
 );
 
 $self->session->param('user' => 'Barney');